445988 has 6 divisors (see below), whose sum is σ = 780486. Its totient is φ = 222992.

The previous prime is 445969. The next prime is 446003. The reversal of 445988 is 889544.

It can be written as a sum of positive squares in only one way, i.e., 438244 + 7744 = 662^2 + 88^2 .

It is a super-2 number, since 2×445988² = 397810592288, which contains 22 as substring.

It is a nialpdrome in base 14.

It is an unprimeable number.

445988 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55745 + ... + 55752.

It is an arithmetic number, because the mean of its divisors is an integer number (130081).

2⁴⁴⁵⁹⁸⁸ is an apocalyptic number.

It is an amenable number.

445988 is a deficient number, since it is larger than the sum of its proper divisors (334498).

445988 is a wasteful number, since it uses less digits than its factorization.

445988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111501 (or 111499 counting only the distinct ones).

The product of its digits is 46080, while the sum is 38.

The square root of 445988 is about 667.8233299309. The cubic root of 445988 is about 76.4025272594.

Subtracting 445988 from its reverse (889544), we obtain a square (443556 = 666²).

The spelling of 445988 in words is "four hundred forty-five thousand, nine hundred eighty-eight".